Sin5x cos2x + cos5x sin2x=

1 answer

It matches the pattern of
sin(A+B) = sinAcosB + cosAsinB

sin5x cos2x + cos5x sin2x
= sin(5x+2x)
= sin (7x)
Similar Questions
  1. Simplify:(cosx + cos2x + cos3x + cos4x + cos5x + cos6x) / (sinx + sin2x + sin3x + sin4x + sin5x + sin6x) into a single Cotangent
    1. answers icon 2 answers
  2. Solve identity,(1-sin2x)/cos2x = cos2x/(1+sin2x) I tried starting from the right side, RS: =(cos²x-sin²x)/(1+2sinxcosx)
    1. answers icon 3 answers
  3. Hi, I need help differentiating this equationy=(cos5x) (e^-5x ) This is what I tried to do.... -5 (sin5x) (e^-5x) + 5 (e^-5x)
    1. answers icon 1 answer
  4. Solve the equation of the interval (0, 2pi)cosx=sinx I squared both sides to get :cos²x=sin²x Then using tri indentites I came
    1. answers icon 4 answers
more similar questions